Gem sound amplifier #exa 1005

I Think that something like a transistor is getting hot and then shutting down. Exploring inside might solve the problem of what's getting really hot. You could even get some Servisol Freeze Spray, and wait for it to go off then spray it on the suspected part. That will cool it down and it should start up again. If it does come on, that part will have to be replaced.

What is the make and model, it sounds like its going into overload protection, if the speakers aren't hooked up you have some bad components in the output section.

Pleae check to see if you have over loaded the output with a wrong impedance . If so try to test the speakers and connect accordingly.
Next please check if the input source is bringing in poor signals with noise. try to cut off the hig and low freq to set the treble and bass in mid position. next use a ggood ground to take off any transcient voltage on the body due to any leakage in the power circuits. next you can disconnect and opne the panel and check for dry connections, loose connectors or poor filtering in signal processing or power circuits. If you notice any hum check this out. I hope this helps. Good day

Open the sub box, and check to make sure the sub wires didn't become disconnected. You should need only a screwdriver.

You could check the 115/230 switch. If you are getting power to the unit no fuse or circuit breakers tripped, and you have 8 ohm speakers connected, and a signal in you should get a signal out. Level controls should be up. If all of those things are true, then the amp is broke and needs an electronic technician to repair it.

check the rca's for a short

Hi...
If it's a straight-up power switch then it will need to be replaced if it works off a relay then the relay is gone.

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Dc problem in amplifier (short circuit) needs to be serviced

First of all the EXA-3940 is rated at 350watts per channel in to 8 ohms. The 1400 watts is bridged into a 4 ohm load. Second, the speakers can handle 1000Wats peak with an average of 600 continuous (i'm guessing). That tells me that the amp is underpowered for the speakers. The sensitivity of the amp is such that the mixer is overdriving the input stage. That is what is causing the clipping. If you are looking for more volume, you are probably better off purchasing another amp and running them in bridge mode, 1 per speaker cab. Be careful though, not to overdrive the speaker cabinets either.

Dan

please confirm from your speakers cables in good condition and from your speakers.make maintenance to your amp by air blower-clean air filter-keep good ventilation around.after cleaning and good ventilation make test with any media while you are connecting one speaker only and then connect the other one.